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FFmpeg/libavfilter/vf_histogram.c
Andreas Rheinhardt b4f5201967 avfilter: Replace query_formats callback with union of list and callback 
If one looks at the many query_formats callbacks in existence,
one will immediately recognize that there is one type of default
callback for video and a slightly different default callback for
audio: It is "return ff_set_common_formats_from_list(ctx, pix_fmts);"
for video with a filter-specific pix_fmts list. For audio, it is
the same with a filter-specific sample_fmts list together with
ff_set_common_all_samplerates() and ff_set_common_all_channel_counts().

This commit allows to remove the boilerplate query_formats callbacks
by replacing said callback with a union consisting the old callback
and pointers for pixel and sample format arrays. For the not uncommon
case in which these lists only contain a single entry (besides the
sentinel) enum AVPixelFormat and enum AVSampleFormat fields are also
added to the union to store them directly in the AVFilter,
thereby avoiding a relocation.

The state of said union will be contained in a new, dedicated AVFilter
field (the nb_inputs and nb_outputs fields have been shrunk to uint8_t
in order to create a hole for this new field; this is no problem, as
the maximum of all the nb_inputs is four; for nb_outputs it is only
two).

The state's default value coincides with the earlier default of
query_formats being unset, namely that the filter accepts all formats
(and also sample rates and channel counts/layouts for audio)
provided that these properties agree coincide for all inputs and
outputs.

By using different union members for audio and video filters
the type-unsafety of using the same functions for audio and video
lists will furthermore be more confined to formats.c than before.

When the new fields are used, they will also avoid allocations:
Currently something nearly equivalent to ff_default_query_formats()
is called after every successful call to a query_formats callback;
yet in the common case that the newly allocated AVFilterFormats
are not used at all (namely if there are no free links) these newly
allocated AVFilterFormats are freed again without ever being used.
Filters no longer using the callback will not exhibit this any more.

Reviewed-by: Paul B Mahol <onemda@gmail.com>
Reviewed-by: Nicolas George <george@nsup.org>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2021-10-05 17:48:25 +02:00

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/*
* Copyright (c) 2012-2019 Paul B Mahol
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/colorspace.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include "libavutil/pixdesc.h"
#include "libavutil/imgutils.h"
#include "libavutil/intreadwrite.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "video.h"
typedef struct HistogramContext {
const AVClass *class; ///< AVClass context for log and options purpose
int thistogram;
int envelope;
int slide;
unsigned histogram[256*256];
int histogram_size;
int width;
int x_pos;
int mult;
int ncomp;
int dncomp;
uint8_t bg_color[4];
uint8_t fg_color[4];
uint8_t envelope_rgba[4];
uint8_t envelope_color[4];
int level_height;
int scale_height;
int display_mode;
int levels_mode;
const AVPixFmtDescriptor *desc, *odesc;
int components;
float fgopacity;
float bgopacity;
int planewidth[4];
int planeheight[4];
int start[4];
AVFrame *out;
} HistogramContext;
#define OFFSET(x) offsetof(HistogramContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
#define COMMON_OPTIONS \
{ "display_mode", "set display mode", OFFSET(display_mode), AV_OPT_TYPE_INT, {.i64=2}, 0, 2, FLAGS, "display_mode"}, \
{ "d", "set display mode", OFFSET(display_mode), AV_OPT_TYPE_INT, {.i64=2}, 0, 2, FLAGS, "display_mode"}, \
{ "overlay", NULL, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "display_mode" }, \
{ "parade", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "display_mode" }, \
{ "stack", NULL, 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, FLAGS, "display_mode" }, \
{ "levels_mode", "set levels mode", OFFSET(levels_mode), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, "levels_mode"}, \
{ "m", "set levels mode", OFFSET(levels_mode), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, "levels_mode"}, \
{ "linear", NULL, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "levels_mode" }, \
{ "logarithmic", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "levels_mode" }, \
{ "components", "set color components to display", OFFSET(components), AV_OPT_TYPE_INT, {.i64=7}, 1, 15, FLAGS}, \
{ "c", "set color components to display", OFFSET(components), AV_OPT_TYPE_INT, {.i64=7}, 1, 15, FLAGS},
static const AVOption histogram_options[] = {
{ "level_height", "set level height", OFFSET(level_height), AV_OPT_TYPE_INT, {.i64=200}, 50, 2048, FLAGS},
{ "scale_height", "set scale height", OFFSET(scale_height), AV_OPT_TYPE_INT, {.i64=12}, 0, 40, FLAGS},
COMMON_OPTIONS
{ "fgopacity", "set foreground opacity", OFFSET(fgopacity), AV_OPT_TYPE_FLOAT, {.dbl=0.7}, 0, 1, FLAGS},
{ "f", "set foreground opacity", OFFSET(fgopacity), AV_OPT_TYPE_FLOAT, {.dbl=0.7}, 0, 1, FLAGS},
{ "bgopacity", "set background opacity", OFFSET(bgopacity), AV_OPT_TYPE_FLOAT, {.dbl=0.5}, 0, 1, FLAGS},
{ "b", "set background opacity", OFFSET(bgopacity), AV_OPT_TYPE_FLOAT, {.dbl=0.5}, 0, 1, FLAGS},
{ NULL }
};
AVFILTER_DEFINE_CLASS(histogram);
static const enum AVPixelFormat levels_in_pix_fmts[] = {
AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUVJ420P,
AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVJ422P,
AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUVJ411P,
AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV410P,
AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVJ444P,
AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,
AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12,
AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRP,
AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRAP10,
AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRAP12,
AV_PIX_FMT_GRAY8,
AV_PIX_FMT_NONE
};
static const enum AVPixelFormat levels_out_yuv8_pix_fmts[] = {
AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P,
AV_PIX_FMT_NONE
};
static const enum AVPixelFormat levels_out_yuv9_pix_fmts[] = {
AV_PIX_FMT_YUVA444P9, AV_PIX_FMT_YUV444P9,
AV_PIX_FMT_NONE
};
static const enum AVPixelFormat levels_out_yuv10_pix_fmts[] = {
AV_PIX_FMT_YUVA444P10, AV_PIX_FMT_YUV444P10,
AV_PIX_FMT_NONE
};
static const enum AVPixelFormat levels_out_yuv12_pix_fmts[] = {
AV_PIX_FMT_YUVA444P12, AV_PIX_FMT_YUV444P12,
AV_PIX_FMT_NONE
};
static const enum AVPixelFormat levels_out_rgb8_pix_fmts[] = {
AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRP,
AV_PIX_FMT_NONE
};
static const enum AVPixelFormat levels_out_rgb9_pix_fmts[] = {
AV_PIX_FMT_GBRP9,
AV_PIX_FMT_NONE
};
static const enum AVPixelFormat levels_out_rgb10_pix_fmts[] = {
AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRAP10,
AV_PIX_FMT_NONE
};
static const enum AVPixelFormat levels_out_rgb12_pix_fmts[] = {
AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRAP12,
AV_PIX_FMT_NONE
};
static int query_formats(AVFilterContext *ctx)
{
AVFilterFormats *avff;
const AVPixFmtDescriptor *desc;
const enum AVPixelFormat *out_pix_fmts;
int rgb, i, bits;
int ret;
if (!ctx->inputs[0]->incfg.formats ||
!ctx->inputs[0]->incfg.formats->nb_formats) {
return AVERROR(EAGAIN);
}
if (!ctx->inputs[0]->outcfg.formats)
if ((ret = ff_formats_ref(ff_make_format_list(levels_in_pix_fmts), &ctx->inputs[0]->outcfg.formats)) < 0)
return ret;
avff = ctx->inputs[0]->incfg.formats;
desc = av_pix_fmt_desc_get(avff->formats[0]);
rgb = desc->flags & AV_PIX_FMT_FLAG_RGB;
bits = desc->comp[0].depth;
for (i = 1; i < avff->nb_formats; i++) {
desc = av_pix_fmt_desc_get(avff->formats[i]);
if ((rgb != (desc->flags & AV_PIX_FMT_FLAG_RGB)) ||
(bits != desc->comp[0].depth))
return AVERROR(EAGAIN);
}
if (rgb && bits == 8)
out_pix_fmts = levels_out_rgb8_pix_fmts;
else if (rgb && bits == 9)
out_pix_fmts = levels_out_rgb9_pix_fmts;
else if (rgb && bits == 10)
out_pix_fmts = levels_out_rgb10_pix_fmts;
else if (rgb && bits == 12)
out_pix_fmts = levels_out_rgb12_pix_fmts;
else if (bits == 8)
out_pix_fmts = levels_out_yuv8_pix_fmts;
else if (bits == 9)
out_pix_fmts = levels_out_yuv9_pix_fmts;
else if (bits == 10)
out_pix_fmts = levels_out_yuv10_pix_fmts;
else if (bits == 12)
out_pix_fmts = levels_out_yuv12_pix_fmts;
else
return AVERROR(EAGAIN);
if ((ret = ff_formats_ref(ff_make_format_list(out_pix_fmts), &ctx->outputs[0]->incfg.formats)) < 0)
return ret;
return 0;
}
static const uint8_t black_yuva_color[4] = { 0, 127, 127, 255 };
static const uint8_t black_gbrp_color[4] = { 0, 0, 0, 255 };
static const uint8_t white_yuva_color[4] = { 255, 127, 127, 255 };
static const uint8_t white_gbrp_color[4] = { 255, 255, 255, 255 };
static int config_input(AVFilterLink *inlink)
{
HistogramContext *s = inlink->dst->priv;
s->desc = av_pix_fmt_desc_get(inlink->format);
s->ncomp = s->desc->nb_components;
s->histogram_size = 1 << s->desc->comp[0].depth;
s->mult = s->histogram_size / 256;
switch (inlink->format) {
case AV_PIX_FMT_GBRAP12:
case AV_PIX_FMT_GBRP12:
case AV_PIX_FMT_GBRAP10:
case AV_PIX_FMT_GBRP10:
case AV_PIX_FMT_GBRP9:
case AV_PIX_FMT_GBRAP:
case AV_PIX_FMT_GBRP:
memcpy(s->bg_color, black_gbrp_color, 4);
memcpy(s->fg_color, white_gbrp_color, 4);
s->start[0] = s->start[1] = s->start[2] = s->start[3] = 0;
memcpy(s->envelope_color, s->envelope_rgba, 4);
break;
default:
memcpy(s->bg_color, black_yuva_color, 4);
memcpy(s->fg_color, white_yuva_color, 4);
s->start[0] = s->start[3] = 0;
s->start[1] = s->start[2] = s->histogram_size / 2;
s->envelope_color[0] = RGB_TO_Y_BT709(s->envelope_rgba[0], s->envelope_rgba[1], s->envelope_rgba[2]);
s->envelope_color[1] = RGB_TO_U_BT709(s->envelope_rgba[0], s->envelope_rgba[1], s->envelope_rgba[2], 0);
s->envelope_color[2] = RGB_TO_V_BT709(s->envelope_rgba[0], s->envelope_rgba[1], s->envelope_rgba[2], 0);
s->envelope_color[3] = s->envelope_rgba[3];
}
s->fg_color[3] = s->fgopacity * 255;
s->bg_color[3] = s->bgopacity * 255;
s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
s->planeheight[0] = s->planeheight[3] = inlink->h;
s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, s->desc->log2_chroma_w);
s->planewidth[0] = s->planewidth[3] = inlink->w;
return 0;
}
static int config_output(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
HistogramContext *s = ctx->priv;
int ncomp = 0, i;
if (!strcmp(ctx->filter->name, "thistogram"))
s->thistogram = 1;
for (i = 0; i < s->ncomp; i++) {
if ((1 << i) & s->components)
ncomp++;
}
if (s->thistogram) {
if (!s->width)
s->width = ctx->inputs[0]->w;
outlink->w = s->width * FFMAX(ncomp * (s->display_mode == 1), 1);
outlink->h = s->histogram_size * FFMAX(ncomp * (s->display_mode == 2), 1);
} else {
outlink->w = s->histogram_size * FFMAX(ncomp * (s->display_mode == 1), 1);
outlink->h = (s->level_height + s->scale_height) * FFMAX(ncomp * (s->display_mode == 2), 1);
}
s->odesc = av_pix_fmt_desc_get(outlink->format);
s->dncomp = s->odesc->nb_components;
outlink->sample_aspect_ratio = (AVRational){1,1};
return 0;
}
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
{
HistogramContext *s = inlink->dst->priv;
AVFilterContext *ctx = inlink->dst;
AVFilterLink *outlink = ctx->outputs[0];
AVFrame *out = s->out;
int i, j, k, l, m;
if (!s->thistogram || !out) {
out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!out) {
av_frame_free(&in);
return AVERROR(ENOMEM);
}
s->out = out;
for (k = 0; k < 4 && out->data[k]; k++) {
const int is_chroma = (k == 1 || k == 2);
const int dst_h = AV_CEIL_RSHIFT(outlink->h, (is_chroma ? s->odesc->log2_chroma_h : 0));
const int dst_w = AV_CEIL_RSHIFT(outlink->w, (is_chroma ? s->odesc->log2_chroma_w : 0));
if (s->histogram_size <= 256) {
for (i = 0; i < dst_h ; i++)
memset(out->data[s->odesc->comp[k].plane] +
i * out->linesize[s->odesc->comp[k].plane],
s->bg_color[k], dst_w);
} else {
const int mult = s->mult;
for (i = 0; i < dst_h ; i++)
for (j = 0; j < dst_w; j++)
AV_WN16(out->data[s->odesc->comp[k].plane] +
i * out->linesize[s->odesc->comp[k].plane] + j * 2,
s->bg_color[k] * mult);
}
}
}
for (m = 0, k = 0; k < s->ncomp; k++) {
const int p = s->desc->comp[k].plane;
const int max_value = s->histogram_size - 1 - s->start[p];
const int height = s->planeheight[p];
const int width = s->planewidth[p];
double max_hval_log;
unsigned max_hval = 0;
int starty, startx;
if (!((1 << k) & s->components))
continue;
if (s->thistogram) {
starty = m * s->histogram_size * (s->display_mode == 2);
startx = m++ * s->width * (s->display_mode == 1);
} else {
startx = m * s->histogram_size * (s->display_mode == 1);
starty = m++ * (s->level_height + s->scale_height) * (s->display_mode == 2);
}
if (s->histogram_size <= 256) {
for (i = 0; i < height; i++) {
const uint8_t *src = in->data[p] + i * in->linesize[p];
for (j = 0; j < width; j++)
s->histogram[src[j]]++;
}
} else {
for (i = 0; i < height; i++) {
const uint16_t *src = (const uint16_t *)(in->data[p] + i * in->linesize[p]);
for (j = 0; j < width; j++)
s->histogram[src[j]]++;
}
}
for (i = 0; i < s->histogram_size; i++)
max_hval = FFMAX(max_hval, s->histogram[i]);
max_hval_log = log2(max_hval + 1);
if (s->thistogram) {
const int bpp = 1 + (s->histogram_size > 256);
int minh = s->histogram_size - 1, maxh = 0;
if (s->slide == 2) {
s->x_pos = out->width - 1;
for (j = 0; j < outlink->h; j++) {
memmove(out->data[p] + j * out->linesize[p] ,
out->data[p] + j * out->linesize[p] + bpp,
(outlink->w - 1) * bpp);
}
} else if (s->slide == 3) {
s->x_pos = 0;
for (j = 0; j < outlink->h; j++) {
memmove(out->data[p] + j * out->linesize[p] + bpp,
out->data[p] + j * out->linesize[p],
(outlink->w - 1) * bpp);
}
}
for (int i = 0; i < s->histogram_size; i++) {
int idx = s->histogram_size - i - 1;
int value = s->start[p];
if (s->envelope && s->histogram[idx]) {
minh = FFMIN(minh, i);
maxh = FFMAX(maxh, i);
}
if (s->levels_mode)
value += lrint(max_value * (log2(s->histogram[idx] + 1) / max_hval_log));
else
value += lrint(max_value * s->histogram[idx] / (float)max_hval);
if (s->histogram_size <= 256) {
s->out->data[p][(i + starty) * s->out->linesize[p] + startx + s->x_pos] = value;
} else {
AV_WN16(s->out->data[p] + (i + starty) * s->out->linesize[p] + startx * 2 + s->x_pos * 2, value);
}
}
if (s->envelope) {
if (s->histogram_size <= 256) {
s->out->data[0][(minh + starty) * s->out->linesize[p] + startx + s->x_pos] = s->envelope_color[0];
s->out->data[0][(maxh + starty) * s->out->linesize[p] + startx + s->x_pos] = s->envelope_color[0];
if (s->dncomp >= 3) {
s->out->data[1][(minh + starty) * s->out->linesize[p] + startx + s->x_pos] = s->envelope_color[1];
s->out->data[2][(minh + starty) * s->out->linesize[p] + startx + s->x_pos] = s->envelope_color[2];
s->out->data[1][(maxh + starty) * s->out->linesize[p] + startx + s->x_pos] = s->envelope_color[1];
s->out->data[2][(maxh + starty) * s->out->linesize[p] + startx + s->x_pos] = s->envelope_color[2];
}
} else {
const int mult = s->mult;
AV_WN16(s->out->data[0] + (minh + starty) * s->out->linesize[p] + startx * 2 + s->x_pos * 2, s->envelope_color[0] * mult);
AV_WN16(s->out->data[0] + (maxh + starty) * s->out->linesize[p] + startx * 2 + s->x_pos * 2, s->envelope_color[0] * mult);
if (s->dncomp >= 3) {
AV_WN16(s->out->data[1] + (minh + starty) * s->out->linesize[p] + startx * 2 + s->x_pos * 2, s->envelope_color[1] * mult);
AV_WN16(s->out->data[2] + (minh + starty) * s->out->linesize[p] + startx * 2 + s->x_pos * 2, s->envelope_color[2] * mult);
AV_WN16(s->out->data[1] + (maxh + starty) * s->out->linesize[p] + startx * 2 + s->x_pos * 2, s->envelope_color[1] * mult);
AV_WN16(s->out->data[2] + (maxh + starty) * s->out->linesize[p] + startx * 2 + s->x_pos * 2, s->envelope_color[2] * mult);
}
}
}
} else {
for (i = 0; i < s->histogram_size; i++) {
int col_height;
if (s->levels_mode)
col_height = lrint(s->level_height * (1. - (log2(s->histogram[i] + 1) / max_hval_log)));
else
col_height = s->level_height - (s->histogram[i] * (int64_t)s->level_height + max_hval - 1) / max_hval;
if (s->histogram_size <= 256) {
for (j = s->level_height - 1; j >= col_height; j--) {
if (s->display_mode) {
for (l = 0; l < s->dncomp; l++)
out->data[l][(j + starty) * out->linesize[l] + startx + i] = s->fg_color[l];
} else {
out->data[p][(j + starty) * out->linesize[p] + startx + i] = 255;
}
}
for (j = s->level_height + s->scale_height - 1; j >= s->level_height; j--)
out->data[p][(j + starty) * out->linesize[p] + startx + i] = i;
} else {
const int mult = s->mult;
for (j = s->level_height - 1; j >= col_height; j--) {
if (s->display_mode) {
for (l = 0; l < s->dncomp; l++)
AV_WN16(out->data[l] + (j + starty) * out->linesize[l] + startx * 2 + i * 2, s->fg_color[l] * mult);
} else {
AV_WN16(out->data[p] + (j + starty) * out->linesize[p] + startx * 2 + i * 2, 255 * mult);
}
}
for (j = s->level_height + s->scale_height - 1; j >= s->level_height; j--)
AV_WN16(out->data[p] + (j + starty) * out->linesize[p] + startx * 2 + i * 2, i);
}
}
}
memset(s->histogram, 0, s->histogram_size * sizeof(unsigned));
}
out->pts = in->pts;
av_frame_free(&in);
s->x_pos++;
if (s->x_pos >= s->width) {
s->x_pos = 0;
if (s->thistogram && (s->slide == 4 || s->slide == 0)) {
s->out = NULL;
goto end;
}
} else if (s->thistogram && s->slide == 4) {
return 0;
}
if (s->thistogram) {
AVFrame *clone = av_frame_clone(out);
if (!clone)
return AVERROR(ENOMEM);
return ff_filter_frame(outlink, clone);
}
end:
return ff_filter_frame(outlink, out);
}
static const AVFilterPad inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = filter_frame,
.config_props = config_input,
},
};
static const AVFilterPad outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_output,
},
};
#if CONFIG_HISTOGRAM_FILTER
const AVFilter ff_vf_histogram = {
.name = "histogram",
.description = NULL_IF_CONFIG_SMALL("Compute and draw a histogram."),
.priv_size = sizeof(HistogramContext),
FILTER_INPUTS(inputs),
FILTER_OUTPUTS(outputs),
FILTER_QUERY_FUNC(query_formats),
.priv_class = &histogram_class,
};
#endif /* CONFIG_HISTOGRAM_FILTER */
#if CONFIG_THISTOGRAM_FILTER
static av_cold void uninit(AVFilterContext *ctx)
{
HistogramContext *s = ctx->priv;
av_frame_free(&s->out);
}
static const AVOption thistogram_options[] = {
{ "width", "set width", OFFSET(width), AV_OPT_TYPE_INT, {.i64=0}, 0, 8192, FLAGS},
{ "w", "set width", OFFSET(width), AV_OPT_TYPE_INT, {.i64=0}, 0, 8192, FLAGS},
COMMON_OPTIONS
{ "bgopacity", "set background opacity", OFFSET(bgopacity), AV_OPT_TYPE_FLOAT, {.dbl=0.9}, 0, 1, FLAGS},
{ "b", "set background opacity", OFFSET(bgopacity), AV_OPT_TYPE_FLOAT, {.dbl=0.9}, 0, 1, FLAGS},
{ "envelope", "display envelope", OFFSET(envelope), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS },
{ "e", "display envelope", OFFSET(envelope), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS },
{ "ecolor", "set envelope color", OFFSET(envelope_rgba), AV_OPT_TYPE_COLOR, {.str="gold"}, 0, 0, FLAGS },
{ "ec", "set envelope color", OFFSET(envelope_rgba), AV_OPT_TYPE_COLOR, {.str="gold"}, 0, 0, FLAGS },
{ "slide", "set slide mode", OFFSET(slide), AV_OPT_TYPE_INT, {.i64=1}, 0, 4, FLAGS, "slide" },
{"frame", "draw new frames", OFFSET(slide), AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "slide"},
{"replace", "replace old columns with new", OFFSET(slide), AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "slide"},
{"scroll", "scroll from right to left", OFFSET(slide), AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, FLAGS, "slide"},
{"rscroll", "scroll from left to right", OFFSET(slide), AV_OPT_TYPE_CONST, {.i64=3}, 0, 0, FLAGS, "slide"},
{"picture", "display graph in single frame", OFFSET(slide), AV_OPT_TYPE_CONST, {.i64=4}, 0, 0, FLAGS, "slide"},
{ NULL }
};
AVFILTER_DEFINE_CLASS(thistogram);
const AVFilter ff_vf_thistogram = {
.name = "thistogram",
.description = NULL_IF_CONFIG_SMALL("Compute and draw a temporal histogram."),
.priv_size = sizeof(HistogramContext),
FILTER_INPUTS(inputs),
FILTER_OUTPUTS(outputs),
FILTER_QUERY_FUNC(query_formats),
.uninit = uninit,
.priv_class = &thistogram_class,
};
#endif /* CONFIG_THISTOGRAM_FILTER */
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